Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a509480076ba6aa…

MALICIOUS

PDF

36.0 KB Created: 2021-07-06 09:40:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1cbbb564b7d8bf860016afcc5360915d SHA-1: 6dc80d0fcc7b133bd082a13bd6bc46c5fa728d24 SHA-256: 8a509480076ba6aaaf0223149ab163f928bcef6fe2b6fdb5e8331773fdfae6a0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to known malicious infrastructure, masquerading as game hacks and generators. The document body and embedded URLs suggest a lure for users seeking in-game currency or cheats for popular games like Roblox and Coin Master. The primary malicious activity observed is the redirection to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/431946152/inappropriate-roblox-games-2021-game-hack In PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-survey-only_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/moonactive-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-cheats-how-to-get-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/hack-roblox-transformaciones_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/minecraft-images-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-roblox-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-hack-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-hack-cheat-engine_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-spin-coin-master-online_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-daily-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/do-free-robux-websites-work_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-not-fake-no-verification_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000324f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x324F 23060 bytes
SHA-256: 98dcf74c013db1ca1acdf09e3e994073369bd2a4d8df8968fd29389bdfcdecc5
font_01_sfnt_off00006614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6614 19548 bytes
SHA-256: 52d5a8dd922b8cb39112b7e45497e38a5d4104f0d7200415e33336fa157fb9f1

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